fsockopen question

[soc at visca.com]

Greetings:

Using OpenBSD 4.2, PHP 5.23.

Yesterday I got a complaint from a user that she couldn't send email 
using the php mail program.  I traced the problem down to a problem 
with PHP's fsockopen function.  Here's the script I used to test it:

http://visca.com/php/fsockopen.php
<?php
$fp = fsockopen("localhost", 25, $errno, $errstr);
if (!$fp) {
     echo "ERROR: $errno - $errstr<br />\n";
} else {
     $response = fgets($fp);
     echo "Response is \"$response\"";
}
?>

As you'll see if you follow the link, the script hangs for 60 seconds 
then prints «Response is ""».  Port 25 is open and working.

Can anyone suggest where I might go from here to debug this?
-- 
All the best (Adéu-siau),
Lou Hevly
soc at visca.com
http://visca.com